conda

conda-js

A library to interact with conda from both the browser and Node.js

Usage as a Library

From Node.js:

$ npm install

Then, in your code, use

conda = require('conda');

From the browser, include the Promise polyfill

<script src="https://www.promisejs.org/polyfills/promise-4.0.0.js"></script>

as well as jQuery and the SockJS client library, and then include conda.js.

In your code use Conda like so:

conda.info().then(function(info) {
    // Do something with info
});

The library is structured asynchronously. Under Node.js conda-js calls Conda as a subprocess with the --json option. In the browser, conda-js makes a request to the server, which should use the subprocess as well.

Usage with Backbone

conda-js includes helpers for interacting with Backbone. Currently the only helper is for syncing environment data into a Backbone Collection:

class Environment extends Backbone.Model
  sync: conda.Env.backboneSync  # necessary for model.destroy() 
 
class Environments extends Backbone.Collection
  model: Environment
  sync: conda.Env.backboneSync  # necessary for collection.fetch() 

Only Collection.fetch and Model.destroy are supported.

Usage under Atom Shell/node-webkit

conda-js can be used as a Node library under Atom Shell and node-webkit. The procedure is the same as for Node.js from the renderer side. From the client side, the library expects window.nodeRequire to be the require function (the reason being that some client side libraries redefine require). Under Atom Shell, it should be required using nodeRequire('conda') and not through the remote library (its IPC is incomplete and will break the library).

Contexts

To control the method conda-js uses to make its requests and where it makes its requests, set API_METHOD and API_ROOT. API_METHOD should be either "RPC" (default) or "REST". API_ROOT should be the base URL of the API routes (e.g. /api or http://remote-server.com/conda/api).

Applications interacting with multiple Conda installations need to configure conda.API_ROOT and conda.API_METHOD accordingly. However, these are globals and configuring them for one installation will interfere with operations on others. Thus, conda-js contains a function conda.newContext that creates a new conda library object with its own globals. Create one for each configuration. This method is only available in a browser-like context (browser, Node-Webkit, or Atom Shell).

Example:

// ... define test functions
var conda = window.nodeRequire('conda');
conda.API_METHOD = 'RPC';
conda.API_ROOT = 'http://localhost:8000/api';
 
var context = conda.newContext();
context.API_METHOD = 'REST';
context.API_ROOT = 'http://localhost:8001/api';
 
test(conda);
test(context);

Testing and Development Server

To make the library easier to debug, it comes with its own server. Simply run

$ node devserver.js

and visit http://localhost:8000. Open the JavaScript console and begin using conda-js. If you wish to run tests for the AJAX part of the library as well, run

$ npm run-script pretest

before starting the dev server; then mocha will begin running tests upon visiting localhost.

The Python test server can be used as well:

$ python test.py

Try

$ python test.py --help

for more options. You may want to start both

$ python test.py
$ python test.py --rest --port=8001 --cross-origin

to run the tests for contexts (the test script will run all the tests again, but using REST mode against localhost:8001 instead of localhost:8000).

To test the Node.js part of the library, run

$ npm run-script test